mirror of
https://github.com/genodelabs/genode.git
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5ae0dab6c5
This patch removes the implicit build of all shared libraries a target depends on. Targets only depend on the respective ABIs instead. This alleviates the need to locally build complex shared libraries (think of Qt) when developing applications. Instead, application developers can use binary depot archives. The implementation splits the mk/lib.mk file into three files: - mk/a.mk for building one static library (.lib.a) - mk/so.mk for building one shared object (.lib.so) - mk/abi.mk for building one ABI stub (.abi.so) Furthermore, the commit moves messages and the collection of build artifacts to var/libdeps, triggers the build of kernel-specific ld-<kernel>.lib.so, and prunes the lib-dependency tree at ABIs. Fixes #5061
262 lines
7.2 KiB
Makefile
262 lines
7.2 KiB
Makefile
#
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# Global build configuration variables
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#
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#
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# Read user-provided tools configuration
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#
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-include $(call select_from_repositories,etc/tools.conf)
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-include $(BUILD_BASE_DIR)/etc/tools.conf
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#
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# Set undefined CUSTOM_ tools to their default values
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#
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CUSTOM_CC ?= $(CROSS_DEV_PREFIX)gcc
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CUSTOM_CXX ?= $(CROSS_DEV_PREFIX)g++
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CUSTOM_CPP ?= $(CROSS_DEV_PREFIX)cpp
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CUSTOM_CXX_LIB ?= $(CUSTOM_CXX)
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CUSTOM_LD ?= $(CROSS_DEV_PREFIX)ld
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CUSTOM_AS ?= $(CROSS_DEV_PREFIX)as
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CUSTOM_AR ?= $(CROSS_DEV_PREFIX)ar
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CUSTOM_NM ?= $(CROSS_DEV_PREFIX)nm
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CUSTOM_OBJCOPY ?= $(CROSS_DEV_PREFIX)objcopy
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CUSTOM_RANLIB ?= $(CROSS_DEV_PREFIX)ranlib
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CUSTOM_STRIP ?= $(CROSS_DEV_PREFIX)strip
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CUSTOM_GNATBIND ?= $(CROSS_DEV_PREFIX)gnatbind
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CUSTOM_HOST_CC ?= $(HOST_DEV_PREFIX)gcc
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CUSTOM_HOST_CXX ?= $(HOST_DEV_PREFIX)g++
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CUSTOM_ADA_CC ?= $(CUSTOM_CC)
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CUSTOM_ALI2DEP ?= $(CROSS_DEV_PREFIX)ali2dep
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CUSTOM_GO ?= $(CROSS_DEV_PREFIX)gccgo
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#
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# GNU utilities
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#
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# Non-Linux operating systems may have to install 'findutils'
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# to get the GNU versions of xargs and find.
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#
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TAC ?= tac
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GNU_FIND ?= find
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GNU_XARGS ?= xargs
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ECHO ?= echo -e
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#
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# Build tools
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#
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CC = $(CUSTOM_CC)
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CXX = $(CUSTOM_CXX)
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CPP = $(CUSTOM_CPP)
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LD = $(CUSTOM_LD)
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AS = $(CUSTOM_AS)
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AR = $(CUSTOM_AR)
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NM = $(CUSTOM_NM)
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OBJCOPY = $(CUSTOM_OBJCOPY)
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RANLIB = $(CUSTOM_RANLIB)
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STRIP = $(CUSTOM_STRIP)
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GNATBIND = $(CUSTOM_GNATBIND)
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HOST_CC = $(CUSTOM_HOST_CC)
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ADA_CC = $(CUSTOM_ADA_CC)
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ALI2DEP = $(CUSTOM_ALI2DEP)
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GOLANG = $(CUSTOM_GO)
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#
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# Compiler and Linker options
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#
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#
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# Options for automatically generating dependency files
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#
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# We specify the target for the generated dependency file explicitly via
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# the -MT option. Unfortunately, this option is handled differently by
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# different gcc versions. Older versions used to always append the object
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# file to the target. However, gcc-4.3.2 takes the -MT argument literally.
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# So we have to specify both the .o file and the .d file. On older gcc
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# versions, this results in the .o file to appear twice in the target
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# but that is no problem.
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#
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CC_OPT_DEP = -MMD -MP -MT '$@ $(@:.o=.d)'
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#
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# Always compile with '-ffunction-sections' to enable the use of the
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# linker option '-gc-sections'
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#
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CC_OPT += -ffunction-sections
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#
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# Prevent the compiler from optimizations related to strict aliasing
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#
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CC_OPT += -fno-strict-aliasing
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#
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# Do not compile/link with standard includes and standard libraries per
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# default.
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#
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ifneq ($(STDINC),yes)
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CC_OPT_NOSTDINC := -nostdinc
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endif
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ifneq ($(STDLIB),yes)
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LD_OPT_NOSTDLIB := -nostdlib -Wl,-nostdlib
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endif
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#
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# Add coverage options
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#
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# The directory for the coverage data (generated at runtime) is derived from
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# the current build directory and is going to look like
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#
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# '/genodelabs/bin/test-log_gcov/2018-11-13/gcov_data/test-log_gcov'
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#
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# to match the path where the gcov note files (generated at build time) are
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# stored in the depot package of the test program.
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#
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# If depot packages are not used, the path is going to look like
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#
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# '/gcov_data/test-log_gcov'
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#
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ifeq ($(COVERAGE),yes)
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ifneq ($(findstring /depot/,$(CURDIR)),)
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PROFILE_DIR = $(shell echo $(CURDIR) | \
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sed -e 's/^.*\/depot\//\//' \
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-e 's/\.build\/.*//')/gcov_data/$(TARGET)
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else
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PROFILE_DIR = /gcov_data/$(TARGET)
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endif
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CC_OPT += -fprofile-arcs -ftest-coverage -fprofile-dir=$(PROFILE_DIR)
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endif
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#
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# Enable the undefined behavior sanitizer if requested
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#
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ifeq ($(SANITIZE_UNDEFINED),yes)
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CC_OPT += -fsanitize=undefined
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endif
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#
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# Default optimization and warning levels
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#
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CC_OLEVEL ?= -O2
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CC_WARN ?= -Wall
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#
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# XXX fix the warnings and remove this option
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#
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CC_WARN += -Wno-error=implicit-fallthrough
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#
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# Additional warnings for C++
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#
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CC_CXX_WARN_STRICT_CONVERSION ?= -Wconversion
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CC_CXX_WARN_STRICT ?= -Wextra -Weffc++ -Werror -Wsuggest-override \
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$(CC_CXX_WARN_STRICT_CONVERSION)
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CC_CXX_WARN ?= $(CC_WARN) $(CC_CXX_WARN_STRICT)
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#
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# Additional warnings for Ada/SPARK
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#
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CC_ADA_WARN_STRICT ?= -gnatwe -gnatyyBdSux
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CC_ADA_WARN ?= -gnatwa $(CC_ADA_WARN_STRICT)
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#
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# Aggregate compiler options that are common for C and C++
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#
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CC_OPT += $(CC_OPT_NOSTDINC) -g $(CC_MARCH) $(CC_OLEVEL) $(CC_OPT_DEP) $(CC_WARN)
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#
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# Incorporate source-file-specific compiler options
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#
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# The make variable $* refers to the currently processed compilation
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# unit when 'CC_OPT' gets implicitly expanded by the rules '%.o: %.c'
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# and '%.o: %.cc' of 'generic.mk'.
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#
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# We substitute '.' characters by '_' to allow source-file-specific
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# compiler options for files with more than one dot in their name.
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#
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CC_OPT += $(CC_OPT_$(subst .,_,$*))
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#
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# Build program position independent as well
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#
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CC_OPT_PIC ?= -fPIC
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CC_OPT += $(CC_OPT_PIC)
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#
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# Predefine C and C++ specific compiler options with their common values
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#
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CC_CXX_OPT += $(CC_OPT) $(CC_CXX_WARN)
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CC_C_OPT += $(CC_OPT)
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CC_ADA_OPT += $(CC_ADA_WARN) -fexceptions
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CC_ADA_OPT += $(filter-out -fno-builtin-cos -fno-builtin-sin \
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-fno-builtin-cosf -fno-builtin-sinf ,$(CC_OPT))
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#
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# Enable C++11 by default
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#
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# We substitute '.' characters by '_' to allow a source-file-specific
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# C++ standard option for files with more than one dot in their name.
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#
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CC_CXX_OPT_STD ?= -std=gnu++20
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CC_CXX_OPT += $(lastword $(CC_CXX_OPT_STD) $(CC_CXX_OPT_STD_$(subst .,_,$*)))
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#
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# Linker options
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#
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# Use '-gc-sections' by default but allow a platform to disable this feature by
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# defining 'LD_GC_SECTIONS' empty. This is needed for older tool chains (gcc
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# version 4.11 and binutils version 2.16), which happen to produce broken
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# code when '-gc-sections' is enabled. Also, set max-page-size to 4KiB to
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# prevent the linker from aligning the text segment to any built-in default
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# (e.g., 4MiB on x86_64 or 64KiB on ARM). Otherwise, the padding bytes are
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# wasted at the beginning of the final binary.
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#
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LD_OPT_GC_SECTIONS ?= -gc-sections
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LD_OPT_ALIGN_SANE = -z max-page-size=0x1000
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LD_OPT_NX_STACK = -z noexecstack
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LD_OPT_PREFIX := -Wl,
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LD_OPT += $(LD_MARCH) $(LD_OPT_GC_SECTIONS) $(LD_OPT_ALIGN_SANE) $(LD_OPT_NX_STACK)
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CXX_LINK_OPT += $(addprefix $(LD_OPT_PREFIX),$(LD_OPT))
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CXX_LINK_OPT += $(LD_OPT_NOSTDLIB)
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#
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# Genode linker does not support .gnu.hash so there is no point in having it
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# in the ELF files. Tell the linker to only produce SysV hash tables.
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#
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LD_OPT += --hash-style=sysv
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#
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# Linker script for dynamically linked programs
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#
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LD_SCRIPT_DYN ?= $(BASE_DIR)/src/ld/genode_dyn.ld
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#
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# Linker script for shared libraries
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#
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LD_SCRIPT_SO ?= $(BASE_DIR)/src/ld/genode_rel.ld
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#
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# Assembler options
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#
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AS_OPT += $(AS_MARCH)
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ALL_INC_DIR := .
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ALL_INC_DIR += $(INC_DIR)
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ALL_INC_DIR += $(foreach DIR,$(REP_INC_DIR), $(foreach REP,$(REPOSITORIES),$(REP)/$(DIR)))
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ALL_INC_DIR += $(foreach REP,$(REPOSITORIES),$(REP)/include)
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ALL_INC_DIR += $(LIBGCC_INC_DIR)
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ALL_INC_DIR += $(HOST_INC_DIR)
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VERBOSE ?= @
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VERBOSE_DIR ?= --no-print-directory
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MSG_LINK ?= @$(ECHO) " LINK "
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MSG_COMP ?= @$(ECHO) " COMPILE "
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MSG_BUILD ?= @$(ECHO) " BUILD "
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MSG_RENAME ?= @$(ECHO) " RENAME "
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MSG_MERGE ?= @$(ECHO) " MERGE "
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MSG_CONVERT ?= @$(ECHO) " CONVERT "
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MSG_CONFIG ?= @$(ECHO) " CONFIG "
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MSG_CLEAN ?= @$(ECHO) " CLEAN "
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MSG_ASSEM ?= @$(ECHO) " ASSEMBLE "
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MSG_INST ?= @$(ECHO) " INSTALL "
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